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Blood test hope for cancer diagnosis

CANCER diagnosis and treatment could be "revolutionised" by a new low-cost blood test that allows doctors to track genetic changes in tumour cells, researchers claim.

The "liquid biopsy" test identifies defective fragments of DNA shed into the bloodstream by cancer cells as they die.

Scientists have already used it to detect genetic faults involved in tumour growth in blood samples from 20 women with ovarian cancer.

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